[Enzymes of white rot fungi involved in lignin degradation].

The presence of oxidases and peroxidases was tested qualitatively in 12 strains of white rot Basidiomycetes. Plate tests with gallic acid, tannic acid, guayacol, Poly R-478 and Azure B were used. Fomes sclerodermeus, Phlebia sp. and Pycnoporus sanguineus were selected for further studies because they produced the largest areas of degradation in all media tested. Poly R-478 degradation and manganese peroxidase, lignin peroxidase and laccase activities were measured in glucose-asparagine (N-sufficient) and Kirk (N-limited) media. The highest activities were produced by F. sclerodermeus cultured in glucose asparagine medium.